A new report by the Middle East Media Research Institute – which monitors ISIS online – claims militants are openly discussing slavery on social media.
It says that the terrorists are discussing prices for the women – some of whom are yet to reach their teenage years.
The shocking messsages also apparently reveal a horrific trade in the “possible trafficking in human organs”.
Earlier this year dozens of bodies were discovered with surgical incisions as well as missing kidneys and other vital organs, according to the Iraqi ambassador to the United Nations Mohamed Alhakim.
The corpses were found piled up in shallow, mass graves in February.
It recently emerged that the heinous fighters are claiming rape is part of their distorted interpretation of Islam – arguing that the Koran “encourages and condones” attacks on women who do not belong to a Muslim faith.
The Yazidi religious sect have found themselves as a terror target for the group in Iraq and Syria.
ISIS has captured thousands of Yazidi women
A total of 5,270 members of the minority were said to have been abducted last year, while over 3,000 are reportedly still in the clutches of the notorious terrorists.
A 12-year-old girl who escaped the group said that her abuser told her that raping her was not a sin because she was not Muslim – telling her that his religion encourages the horrific act.
After tying her up and gagging her, he knelt beside the bed she was helplessly laying on and prayed.
She said: “Afterwards, he prayed again. I kept telling him it hurts – please stop.
“He told me that according to Islam he is allowed to rape an unbeliever. He said that by raping me, he is drawing closer to God.”
The depraved group has been internationally condemned by Muslims for using a twisted interpretation of Islam to justify their repulsive acts.